Field Sequential LCD with Polymer Network for Fast Response
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Solution Overview
Problem
Conventional LCDs face challenges in achieving high transmittance and color purity due to the use of color filters and require slow warm-up processes in quick response modes, which restrict their application.
Innovation Solution
The implementation of a field sequential backlight module with a polymer liquid crystal layer, where the liquid crystal molecules are anchored in a bend state by a polymer network formed from polymerizable monomers, allowing them to switch to a homeotropic state with electricity, eliminating the need for color filters and accelerating response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If color filters are used to realize color display, then color display is achieved, but transmittance is greatly lowered
Solution Approach 1:
The patent extracts and removes the color filter layer from the LCD structure, replacing it with a field sequential backlight module that generates colors through temporal sequencing rather than spatial filtering. This eliminates the fundamental cause of light loss while maintaining color display capability.
Solution Approach 2:
The patent implements field sequential display mode where the backlight module sequentially emits red, green, and blue lights in periodic cycles. This temporal periodic action replaces the spatial color filtering approach, allowing full-spectrum light to pass through the liquid crystal layer while color is synthesized through time-based sequencing.
2Speed
If OCB mode is used to achieve quick response, then response speed is improved, but warm-up process becomes very slow
Solution Approach 1:
The patent changes the molecular anchoring parameters by using polymer networks with specific elastic properties that preferentially anchor liquid crystal molecules in the bend state. This parameter change in the boundary conditions allows the system to achieve fast response characteristics without requiring the slow warm-up process typical of OCB mode.
Solution Approach 2:
The patent performs preliminary action by pre-anchoring the liquid crystal molecules in the bend state through polymer network formation during the manufacturing process. This preliminary structural arrangement eliminates the need for the slow warm-up process, as the molecules are already positioned for rapid switching when voltage is applied.
3Use of energy by moving object
If field sequential display mode is used to eliminate color filter, then transmittance and color purity are improved, but frequency requirement becomes three times higher
Solution Approach 1:
The patent employs dynamic liquid crystal switching characteristics that enable rapid response at high frequencies. The combination of polymer-stabilized bend state architecture and fast-response liquid crystal materials allows the system to dynamically adapt to the higher frequency requirements of field sequential display, achieving stable operation at triple the frequency of conventional displays.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances transmittance and color purity while omitting the slow warm-up process, enabling faster response times and broader application of LCDs.
Implementation Method 1
wherein the polymer liquid crystal layer comprises a polymer network formed by polymerizable monomers
Implementation Method 2
the liquid crystal molecules stay in the bend state to accelerate the response
Data Source
AI summary
The invention provides a quick response LCD device and manufacturing method thereof. The LCD device uses field sequential backlight module to realize color display and eliminates color films in conventional LCD panel to achieve high transmittance and color purity; a polymer liquid crystal layer (28) is disposed in LCD panel (2), the polymer liquid crystal layer (28) comprises a polymer network (281) formed by polymerizable monomers and liquid crystal (282) anchored by the polymer network (281) to stay in bend state without electricity and in homeotropic state when electricity applied. The warm-up process of the conventional OCB mode is omitted to achieve quick response.